Systems and methods for frame filtering and for enabling frame filtering

Abstract

The disclosure provides systems, methods, and apparatus for early receive chain shutoff using a typified CRC and/or content change indicator signals. In one aspect, a method for low power frame filtering is provided. The method comprises generating a typified checksum based on a transaction identifier and at least a portion of a packet. The method further comprises transmitting, to at least one receiver, the packet comprising the typified checksum.

What is claimed is: 
     
         1 . A method for enabling low power frame filtering, the method comprising:
 generating a typified checksum based on a transaction identifier and at least a portion of a packet;   inserting bits of the typified checksum in a physical layer of the packet; and   transmitting, to at least one receiver, the packet comprising the typified checksum.   
     
     
         2 . The method of  claim 1 , wherein generating a typified checksum comprises generating a typified checksum based on a station transaction identifier associated with the at least one receiver. 
     
     
         3 . The method of  claim 2 , wherein transmitting the packet comprises transmitting the packet in a directed transmission mode. 
     
     
         4 . The method of  claim 1 , wherein generating a typified checksum comprises generating a typified checksum based on at least one frame transaction identifier associated with a type of transmission mode or an information element. 
     
     
         5 . The method of  claim 4 , further comprising generating a content change indicator, wherein the content change indicator provides the at least one receiver with information on whether the packet should be filtered, and wherein bits of the content change indicator are located in a physical layer of the packet. 
     
     
         6 . The method of  claim 5 , wherein bits of the content change indicator are located in a portion of the packet originally allocated for a partial association identification. 
     
     
         7 . The method of  claim 5 , wherein bits of the content change indicator are located in at least one field of a physical layer of the packet that is irrelevant in a multicast or broadcast transmission mode. 
     
     
         8 . The method of  claim 1 , wherein generating a typified checksum comprises generating a typified checksum based on a transaction identifier that is either associated with the at least one receiver or is associated with a type of transmission mode based on whether the at least one receiver receives packets in a directed transmission mode or a non-directed transmission mode. 
     
     
         9 . The method of  claim 1 , further comprising inserting bits of a first signal field in a physical layer of the packet. 
     
     
         10 . The method of  claim 1 , wherein generating the typified checksum further comprises performing an exclusive or (XOR) operation between at least one bit of a first signal field and at least one bit of the transaction identifier. 
     
     
         11 . An apparatus configured to enable low power frame filtering, the apparatus comprising:
 means for generating a typified checksum based on a transaction identifier and at least a portion of a packet;   means for inserting bits of the typified checksum in a physical layer of the packet; and   means for transmitting, to at least one receiver, the packet comprising the typified checksum.   
     
     
         12 . The apparatus of  claim 11 , wherein means for generating a typified checksum comprises means for generating a typified checksum based on a station transaction identifier associated with the at least one receiver. 
     
     
         13 . The apparatus of  claim 11 , wherein means for generating a typified checksum comprises means for generating a typified checksum based on at least one frame transaction identifier associated with a type of transmission mode or an information element. 
     
     
         14 . The apparatus of  claim 11 , wherein means for generating a typified checksum comprises means for generating a typified checksum based on a transaction identifier that is either associated with the at least one receiver or is associated with a type of transmission mode based on whether the at least one receiver receives packets in a directed transmission mode or a non-directed transmission mode. 
     
     
         15 . The apparatus of  claim 11 , further comprising means for inserting bits of a first signal field in a physical layer of the packet. 
     
     
         16 . The apparatus of  claim 11 , wherein means for generating the typified checksum further comprises means for performing an exclusive or (XOR) operation between at least one bit of a first signal field and at least one bit of the transaction identifier. 
     
     
         17 . A non-transitory computer-readable medium comprising code that, when executed, causes an apparatus to:
 generate a typified checksum based on a transaction identifier and at least a portion of a packet;   insert bits of the typified checksum in a physical layer of the packet; and   transmit, to at least one receiver, the packet comprising the typified checksum.   
     
     
         18 . The medium of  claim 17 , further comprising code that, when executed, causes the apparatus to generate a typified checksum based on a station transaction identifier associated with the at least one receiver. 
     
     
         19 . The medium of  claim 17 , further comprising code that, when executed, causes the apparatus to generate a typified checksum based on at least one frame transaction identifier associated with a type of transmission mode or an information element. 
     
     
         20 . The medium of  claim 17 , further comprising code that, when executed, causes the apparatus to generate a typified checksum based on a transaction identifier that is either associated with the at least one receiver or is associated with a type of transmission mode based on whether the at least one receiver receives packets in a directed transmission mode or a non-directed transmission mode. 
     
     
         21 . The medium of  claim 17 , further comprising code that, when executed, causes the apparatus to insert bits of a first signal field in a physical layer of the packet. 
     
     
         22 . The medium of  claim 17 , further comprising code that, when executed, causes the apparatus to perform an exclusive or (XOR) operation between at least one bit of a first signal field and at least one bit of the transaction identifier. 
     
     
         23 . An access point configured to enable low power frame filtering, comprising:
 at least one antenna;   a first circuit configured to generate a typified checksum based on a transaction identifier and at least a portion of a packet, wherein bits of the typified checksum are located in a physical layer of the packet; and   a transmitter configured to transmit, to at least one receiver via the at least one antenna, the packet comprising the typified checksum.   
     
     
         24 . The access point of  claim 23 , wherein the transaction identifier is a station transaction identifier associated with the at least one receiver. 
     
     
         25 . The access point of  claim 24 , wherein the at least one receiver communicates with the transmitter in a directed transmission mode. 
     
     
         26 . The access point of  claim 23 , wherein the transaction identifier comprises at least one frame transaction identifier associated with a type of transmission mode or an information element. 
     
     
         27 . The access point of  claim 26 , further comprising a third circuit configured to generate a content change indicator, wherein the content change indicator provides the at least one receiver with information on whether the packet should be filtered, and wherein bits of the content change indicator are located in a physical layer of the packet. 
     
     
         28 . The access point of  claim 27 , wherein bits of the content change indicator are located in a portion of the packet originally allocated for a partial association identification. 
     
     
         29 . The access point of  claim 27 , wherein bits of the content change indicator are located in at least one field of a physical layer of the packet that is irrelevant in a multicast or broadcast transmission mode. 
     
     
         30 . The access point of  claim 23 , wherein the transaction identifier is either associated with the at least one receiver or is associated with a type of transmission mode based on whether the at least one receiver receives packets in a directed transmission mode or a non-directed transmission mode. 
     
     
         31 . The access point of  claim 23 , wherein bits of a first signal field are located in a physical layer of the packet. 
     
     
         32 . The access point of  claim 23 , wherein the first circuit is further configured to perform an exclusive or (XOR) operation between at least one bit of a first signal field and at least one bit of the transaction identifier. 
     
     
         33 . A method for low power frame filtering, the method comprising:
 receiving, by a receiver, a packet comprising a typified checksum;   generating a second checksum based on a transaction identifier and at least a portion of the packet;   comparing the second checksum with the typified checksum; and   determining that the packet is associated with the receiver if the second checksum matches the typified checksum.   
     
     
         34 . The method of  claim 33 , wherein generating a second checksum comprises generating a second checksum based on a station transaction identifier associated with the receiver. 
     
     
         35 . The method of  claim 33 , wherein generating a second checksum comprises generating a second checksum based on at least one frame transaction identifier associated with a type of transmission mode or an information element. 
     
     
         36 . The method of  claim 33 , wherein generating a second checksum comprises generating a second checksum based on a transaction identifier that is either associated with the receiver or is associated with a type of transmission mode based on whether the receiver receives packets in a directed transmission mode or a non-directed transmission mode. 
     
     
         37 . The method of  claim 33 , wherein determining that the packet is associated with the receiver further comprises determining that the packet is associated with the receiver based only on decoding a physical layer of the packet. 
     
     
         38 . The method of  claim 33 , wherein generating the second checksum further comprises performing an exclusive or (XOR) operation between at least one bit of a first signal field and at least one bit of the transaction identifier. 
     
     
         39 . An apparatus configured for low power frame filtering, the apparatus comprising:
 means for receiving, by a receiver, a packet comprising a typified checksum;   means for generating a second checksum based on a transaction identifier and at least a portion of the packet;   means for comparing the second checksum with the typified checksum; and   means for determining that the packet is associated with the receiver if the second checksum matches the typified checksum.   
     
     
         40 . The apparatus of  claim 39 , wherein means for generating a second checksum comprises means for generating a second checksum based on a station transaction identifier associated with the receiver. 
     
     
         41 . The apparatus of  claim 39 , wherein means for determining that the packet is associated with the receiver further comprises means for determining that the packet is associated with the receiver based only on decoding a physical layer of the packet. 
     
     
         42 . A non-transitory computer-readable medium comprising code that, when executed, causes an apparatus to:
 receive, by a receiver, a packet comprising a typified checksum;   generate a second checksum based on a transaction identifier and at least a portion of the packet;   compare the second checksum with the typified checksum; and   determine that the packet is associated with the receiver if the second checksum matches the typified checksum.   
     
     
         43 . The medium of  claim 42 , further comprising code that, when executed, causes the apparatus to generate a second checksum based on a station transaction identifier associated with the receiver. 
     
     
         44 . The medium of  claim 42 , further comprising code that, when executed, causes the apparatus to determine that the packet is associated with the receiver based only on decoding a physical layer of the packet. 
     
     
         45 . An apparatus configured for low power frame filtering, the apparatus comprising:
 a receiver configured to receive a packet comprising a typified checksum;   a first circuit configured to generate a second checksum based on a transaction identifier and at least a portion of the packet; and   a second circuit configured to compare the second checksum with the typified checksum and to determine that the packet is associated with the receiver if the second checksum matches the typified checksum.   
     
     
         46 . The apparatus of  claim 45 , wherein the transaction identifier is a station transaction identifier associated with the receiver. 
     
     
         47 . The apparatus of  claim 45 , wherein the transaction identifier comprises at least one frame transaction identifier associated with a type of transmission mode or an information element. 
     
     
         48 . The apparatus of  claim 45 , wherein the transaction identifier is either associated with the receiver or is associated with a type of transmission mode based on whether the receiver receives packets in a directed transmission mode or a non-directed transmission mode. 
     
     
         49 . The apparatus of  claim 45 , wherein the second circuit is further configured to determine that the packet is associated with the receiver based only on decoding a physical layer of the packet. 
     
     
         50 . The apparatus of  claim 45 , wherein the first circuit is further configured to perform an exclusive or (XOR) operation between at least one bit of a first signal field and at least one bit of the transaction identifier. 
     
     
         51 . A method for enabling low power frame filtering, the method comprising:
 generating a checksum based on a media access control (MAC) header field of a packet;   inserting the checksum in the MAC header field; and   transmitting the packet comprising the MAC header field.   
     
     
         52 . An apparatus configured to enable low power frame filtering, the apparatus comprising:
 means for generating a checksum based on a media access control (MAC) header field of a packet;   means for inserting the checksum in the MAC header field; and   means for transmitting the packet comprising the MAC header field.   
     
     
         53 . A non-transitory computer-readable medium comprising code that, when executed, causes an apparatus to:
 generate a checksum based on a media access control (MAC) header field of a packet;   insert the checksum in the MAC header field; and   transmit the packet comprising the MAC header field.   
     
     
         54 . An access point configured to enable low power frame filtering, comprising:
 at least one antenna;   a first circuit configured to generate a checksum based on a media access control (MAC) header field of a packet and configured to insert the checksum in the MAC header field; and   a transmitter configured to transmit the packet comprising the MAC header field.   
     
     
         55 . A method for low power frame filtering, the method comprising:
 receiving, by a receiver, a packet comprising a media access control (MAC) header field and a first checksum inserted in the MAC header field;   generating a second checksum based on the MAC header field;   comparing the second checksum with the first checksum; and   determining whether the packet is associated with the receiver based on whether the second checksum matches the first checksum.   
     
     
         56 . The method of  claim 55 , further comprising filtering the packet if the second checksum does not match the first checksum. 
     
     
         57 . An apparatus configured for low power frame filtering, the apparatus comprising:
 means for receiving, by a receiver, a packet comprising a media access control (MAC) header field and a first checksum inserted in the MAC header field;   means for generating a second checksum based on the MAC header field;   means for comparing the second checksum with the first checksum; and   means for determining whether the packet is associated with the receiver based on whether the second checksum matches the first checksum.   
     
     
         58 . A non-transitory computer-readable medium comprising code that, when executed, causes an apparatus to:
 receive, by a receiver, a packet comprising a media access control (MAC) header field and a first checksum inserted in the MAC header field;   generate a second checksum based on the MAC header field;   compare the second checksum with the first checksum; and   determine whether the packet is associated with the receiver based on whether the second checksum matches the first checksum.   
     
     
         59 . An apparatus configured for low power frame filtering, the apparatus comprising:
 a receiver configured to receive a packet comprising a media access control (MAC) header field and a first checksum inserted in the MAC header field;   a first circuit configured to generate a second checksum based on the MAC header field; and   a second circuit configured to compare the second checksum with the first checksum, and configured to determine whether the packet is associated with the receiver based on whether the second checksum matches the first checksum.   
     
     
         60 . The apparatus of  claim 59 , wherein the second circuit is further configured to filter the packet if the second checksum does not match the first checksum.